196 
Onchus plicatus, 4g. P. foss. iii. p.177. Ar- 
magh. 
Onchus Faatain; Ag. P. foss. iii. p. 177. Ar- 
magh. 
Onchus subulatus, 4g. P. foss. iii. p. 177. 
Rhuabon. 
Ctenacanthus major, 4g. P. foss. iii. p. 10. 
t. 4. Bristol. 
Ctenacanthus tenuistriatus, 4g. P. foss. ili. 
p- 11. t. 3. f. 7-11. Bristol. Gorstley 
Rough. 
Ctenacanthus brevis, 4g. P. foss. iii. p. 11. t. 2. 
f. 2. Ichthyodorulithes brevis, Buckl. & 
De la B. (Mse.) Bristol. Armagh. 
Ctenacanthus heterogyrus, 4g. P. foss. iii. 
p. 177. Armagh. 
Ctenacanthus arcuatus, 4g. P. foss. iii. p.177. 
Armagh. 
Ctenacanthus crenulatus, 4g. P. foss. iii. p. 
177. Armagh. 
Ptychacauthus sublevis, 4g. P. foss. iii. p. 23. 
t.5. f. 1-3. Burdie House. 
Sphenacanthus serrulatus, 4g. P. foss. iii. p. 
24. t.1.f.11-13. Burdie House. 
Asteroptychius ornatus, 4g. P. foss. iii. p.176. 
Armagh. 
Asteroptychius Portlockii, 4g. P. foss. iii. p. 
176. Ireland. 
Physonemus subteres, 4g. P. foss. iii. p. 176. 
Armagh. 
Gyracanthus formosus, 4g. P. foss. iii. p. 17. 
t.5. f.4-8. Hibd. Tr. Ed. Roy. Soc. xiii. 
Sow. Zool. Journ. ii. t.8. Burdie House. 
Dudley. Newcastle. Rhuabon. Sun- 
derland. Alnwick. Burnt Island. 
REPORT—1843. 
Gyracanthus tuberculatus, 4g. P. foss. iii. 
p- 19. t. la. f. 1-7. Sunderland. 
Gyracanthus Alnvicensis, 4g. P. foss. ili. 
p- 19. t. la. f.8. Ichthyodorulithes Aln- 
vicensis, Buckl. § De la B. (Msc.) Aln- 
wick Castle. 
Gyracanthus ornatus, 4g. P. foss. iii. p. 177. 
North Wales. 
Oracanthus Milleri, 49. P. foss. iii. p. 13. t. 3. 
f.1-4. Ichthyodorulithes curvicostatus, 
Buckl. § Dela B. (Msc.) Bristol. 
Oracanthus minor, 4g. P. foss. iii. p. 16. t. 3. 
f.5,6. Bristol. Armagh. 
Oracanthus pustulosus, 4g. P. foss. iii. p. 15. 
t.2.f.3,4. Bristol. 
Oracauthus confluens, 4g. P. foss. iii. p. 177. 
Armagh. 
Lepracanthus Colei, Eyert. 
p. 177. Rhuabon. 
Leptacanthus priscus, 4g. P. foss. iii. p. 176. 
Armagh. 
Tristychius arcuatus, 4g. P. foss. iii. p. 22. 
t. la. f.9-11. Greenside near Glasgow. 
Cladacanthus paradoxus, 4g. P. foss.iii. p.176. 
Armagh. 
Cricacanthus Jonesii, 4g. P. foss. iil. p. 176. 
Armagh. 
Orthacanthus cylindricus, 4g. P. foss. iii. 
p. 330. t.45. f.7-9. Leeds. 
Pleuracanthus levissimus, 4g. P. foss. ili. 
p. 66. t. 45. f.4,5. Dudley. 
Pleuracanthus planus, 4g. P. foss. iii. p. 177. 
Leeds. 
Pleuracanthus cylindricus, Zyer¢. Msc. North 
Wales. 
Ay. P. foss. iii. 
Cestraciontes. 
Orodus cinctus, 4g. P. foss. iii. p. 96. t. 11. 
f.1-4. Bristol. 
Orodus ramosus, 4g. P. foss. iii. p. 97. t. 11. 
f.5-9. Bristol. 
Helodus simplex, 4g. P. foss. iii. p. 104. t.19. 
f.8-10. N. Stafford. Coalbrook Dale. 
Helodus lvissimus, 4g. P. foss. iii. p. 104. 
t. 14, f. 1-15. (Psammodus levissimus.) 
Bristol. 
Helodus subteres, 4g. P. foss. iii. p. 105. t.12. 
f. 3,4. (Psammodus subteres.) Bristol. 
Helodus gibberulus, 4g. P. foss. ii. p. 106. 
t. 12. f.1,2. (Psammodus gibberulus.) 
Bristol. 
Helodus turgidus, 4g. P. foss. iii. p.106. t.15. 
f. 1-12. (Psammodus turgidus.) Bris- 
tol. Armagh. 
Helodus mitratus, 4g. P. foss. iii. p. 173. 
Carluke. 
Helodus didymus, 4g. P. foss. iii. p. 173. 
Armagh. 
Helodus mammillaris, 4g. P. foss. iii. p. 173. 
Armagh. 
Helodus planus, 4g. P. foss. iii. p.173. Ar- 
magh. 
Chomatodus cinctus, 4g. P. foss. iii. p. 107. 
t. 15. f. 13-21. (Psammodus cinctus.) 
Bristol. 
Chomatodus linearis, 4. P. foss. iii. p. 108. 
t. 12. f. 5-13. (Psammodus linearis.) 
Bristol. 
Chomatodus truncatus, 4g. P. foss. iii. p.174. 
Armagh. 
Cochliodus contortus, Ag. P. foss. iii. p. 115. 
t.19. f. 14; t. 14. £. 16-33. (Psammodus 
contortus.) Bristol. Armagh. Clifton. 
Cochliodus magnus, 4g. P. foss. iii. p. 174. 
Armagh. 
Cochliodus oblongus, 4g. P. foss. iii. p. 174. 
Armagh. 
Cochliodus acutus, 4g. P. foss. iii. p. 174. 
Armagh. 
Cochliodus striatus, 4g. P. foss. iii. p. 174. 
Armagh. 
Psammodus rugosus, 4g. P. foss. iii. p. 111. 
boub2opte 14-18; t.19.f.15. Con. & Ph. 
Geol. vi. p. 356. Dens tritor rugosus, 
Mill. Cat. Mus. Brist. Bristo]. Armagh. 
Easky. (Hifel.) 
Psammodus porosus, 4g. P. foss. iii. p. 112. 
t.13. f.1-18. Bristol. Armagh. 
Psammodus cornutus, 4g. P. foss. iii. p. 174. 
Armagh. 
Panning obtusus, 4g. Msc. Stafford. 
Peecilodus Jonesii, 4g. P. foss. iii. p. 174. 
Armagh. 
Peecilodus parallelus, 4g. P. foss. iii. p. 174. 
Armagh. 
